* Some changes to scarlet ghouls script, still needs proper core support to work 100% correctly.

* Add item script for the harvester's gift, to prevent creating more than 5 scarlet ghouls, I know this can be done in a better way, but, I couldn't figure out how.
* Add new function Unit::GetAllMinionsByEntry(std::list<Creature*>& Minions, uint32 entry) used to correctly count how many scarlet ghouls a player has, can probably be handy in other situations.

--HG--
branch : trunk

src/game/Unit.h

@@ -1464,6 +1464,7 @@ class TRINITY_DLL_SPEC Unit : public WorldObject
         Player* GetCharmerOrOwnerPlayerOrPlayerItself() const;
 
         void SetMinion(Minion *minion, bool apply);
+        void GetAllMinionsByEntry(std::list<Creature*>& Minions, uint32 entry);
         void RemoveAllMinionsByEntry(uint32 entry);
         void SetCharm(Unit* target, bool apply);
         Unit* GetNextRandomRaidMemberOrPet(float radius);